Hydraulic system for harvesting machines

ABSTRACT

an open center hydraulic system in which a pair of flow divider valves is connected in series with the system&#39;s hydraulic pump to create a parasitic pressure upstream of these flow valves and the feeder and separator clutches are controlled remotely by simple solenoid actuated two-position valves. The cylinders actuating the clutches are of sufficient size upon application of the minimum parasitic pressure to hold the clutches in a given position so that no center neutral position is necessary on the two-position valves.



